abalsamo



Feb. 5 1924.

c. L. T. ABALSAMO SCALE Filed Aug. 18, 1922 2 Sheets-Sheet 1 iC/Z,'arlwlzzz' fax/May Feb. 5 1924. 7 1,482,959

c. L. T. ABALSAMO SCALE Filed Aug. 18, 1922 2 Slieats-Sheet 2 gmanio'cPatented Feb. 5, 1924.

UNITED STATES CARLOS LUIS TOMAS ABALSAMO, OF BUENOS AIRES, ARGENTINA.

SCALE.

Application filed August 18, 1922.

To all whom it may concern:

Be it known that I, Cannes LUIS Tolmis Aniinsario, citizen of theRepublic of Argentina, residing at 178-3 Pueywedon Street, Buenos Aires,rrrgentina, have invented certain new and useful Improvements in Scales,of which the following is a specification.

This invention relates to improvements in scales, its object being toprovide a small counterlmlance scale in which any weight from one grammeto the capacity of the scale may be exactly weighed.

The main feature of the invention is the accuracy in the weighingoperation which may be made so exact that no difference, even of onegramme, may occur, which has not been possible hitherto in the scales inuse, referring naturally to those used generally on the counters ofshops and the like. Furthermore, the buyer can satisfy himself that heis obtaining the correct weight, as the number of grammes in excess of,or lack ing from, the correct weight is always indicated; and since allof the indicators are visible at all times, he can likewise satisfyhimself that the equilibrium of the beam is not disturbed.

The accompanying drawings illustrate an embodiment of the inventionwhich may be considered for all present purposes as the one preferred;but it is to he understood that such embodiment is susceptible ofmodifications and changes within its scope as hereinafter claimed.

In said drawings:

Figure 1 is a front elevation of the eml'iOtllIl'lQIlt referred to.

Fig. 2 is a perspective view thereof.

Fig. 3 is central transverse sectiim, taken on line 3- 3, Fig. 5.

Fig. 4 is a longitudinal vertical section on line 4 4, Fig. 5.

Fig. 5 is a horizontal section on line 55, Fig. 3.

Fig. 6 is an elevation of the beam.

Referring more particularly to the drawings,'the Scale comprises acasing or frame 7c of substantially rectangular shape, open at top andbottom and having a rectangular projection or extension It" at one ofits rear corners, in this instance the right-hand corner, whichextension is left open at its inner side to provide for the mounting andarrangement of the balance beam M, as hereinafter described. The casing7r is designed to rest at its bottom upon the shop counter Serial No.582,720.

or other suitable support,- and it carries at its front end a glassindicator casing 70 likewise subsequently described. A platform Z isdisposed above and closes the top of the easing is and conforms to theshape thereof in that it is extended at its rear right-hand corner so asto overlie the casing extension b; said platform terminating at itsfront end ust short of the glass indicator casing 6 The scale mechanismis located within the casing 70 and comprises two main levers generallydesignated and n and disposed one above the other. The upper lever gconsists of three arms connected integrally together at the center ofthe lever; the two front arms q and being symmetrically curved andarranged in respect of the longitudinal center line of the casing whilethe single rear arm 1 is curved rearwardly and towards the right andprojects at its free end into the casing extension In. The arms 9 and gbranch or fork from the rear arm Q3 and are connected adjacent theirinner or rear ends by a narrow bridge-piece and from this bridge thereis suspended a ring or link it which supports at its bottom a cross-pin11 mounted in a central fork 'n on the lower lever 17,.

The front arms (I and g of the upper lever are supported at their freeends by means of hooks T which are set horizontally into the side wallsof the casing is and from which are suspended elongated rings or links 7these links 1" providing rests on which are seated the projecting outerends of lateral supporting pins 8 fixed to the aforesaid ends of thelever arms. A suspension mounting is also provided for the free end ofthe rear arm 9 but in this case, said arm end has connected to it asuspension link which is hung from a depending U-shape clip 0 pivoted tothe end portion or stem t of the balance beam M. The end portion or stemt carries a second U-shaped clip u (in this case, inverted) which ispivotally connected to it a slight distance to the left of the clip 0(Fig. 3) and said clip a is suspended from a pin n which is suitablyfixed to one of the walls of the eXtension 7c of the casing k, so thatthe clip and pin thus constitute the fulcrum about which beam hf isadapted'to rock, while the other clip 0 provides the transmissionconnection between the beam and the lever system.

The lower lever 11 takes the form of a single curved arm which extendstransversely across the casing and is connected at its center to theupper lever g by the above-mentioned ring or link a. The ends of lever11 have a. suspension mounting comprising hooks r, links 1 and lateralsupporting pins 8 identical. with those previ ously described inconnection with the mounting of the upper lever.

The lever system is operated by the depression of the platform Zconsequent upon the imposition thereon of the article or substance to beweighed. To effect this operation, the platforn'i has fixed to its underside a series of depending rods or fingers o r and 4; which coact,respectively, with the front portions of the lever arms and g and therear or end portions of lever n. A pair of lingers o and a pair offingers o are arranged at adjacent each side edge of the platform; andto the lower edge of each front pair 0/ is attached a notchedbearingpiece 11 for engagement by a knife bearing 03 which projectslaterally from the front portion of the corresponding lever arm or 9Each rear pair of fingers "a carries at its lower end a knife-edgehearing-piece m which rests upon an enlarged and flattened part 72provided upon the adjacent end portion of lever 02.

In consequence of this arrangement, the weight imposed upon the platformwill press the latter downward, and this pressure will be transmittedthrough the fingers or rods 11 to the arms g and of the upper lever andthrough the fingers or rods r to the end portions of the lower lever n;the result being that both levers have a downward swinging movementimparted to them, each lever swinging about its sus pension mounting rrsas a fulcrum. The upper lever in moving downward, exerts a downward pullupon the parts and 0 (Figs. 3 and 4:) which connect it with the extremeend of the stem 25 of the balance beam M. with. the result that thelatter is caused to rock about its fulcrum 'u-u, its free lower endmoving upward. The various parts are thereafter restored to normalposition by the beam, which automatically returns to normal position,due to its own weight, as soon as the material to be weighed is removedfrom the platform; and it may be stated in this connec tion that theparts are so proportioned rela tively to one another as to enable themto efl'ect the requisite differences in the extents of their respectivemovements, as will be understood.

The indicating mechanism employed preferably comprises a plurality ofgraduated scale members disposed within the glass casing 76 and anindividual indicator for each scale. Referring to Fig. 1, it will beobserved that there are two horizontal scale bars a and b arran 'cd 1nspaced su oerposed relation, and a relatively small vertical scale baror member 72 at one end thereof, all mounted in a vertical support orpost is located within casing 711 These scale bars or members haveindicators (2, f and g respectively related to them; the outer endportions of said indicators projecting through slots 0, (Z and y andterminating in arrow-shaped pointers which travel along thecorresponding scale members. The slots referred to are formed throughthe support 76 in juxtaposition to and parallel with the scale members,and are coextensive with the same. Ti lie upper scale member a utilizedfor weight in kilogramrues, and the lower scale member for weight ingramn'ies, while the short vertical scale 72 is the exact weight scaleand is used to indicate the precise number of grammes that the materialbeing weighed either falls short of or exceeds the particular weight forwhich the beam has been set.

With this system of indicators, a spe cial form of balance beam isemployed, such beam M comprising spaced, parallel upper and lowermembers on and m, connected at one end by the solid stem portion t andjoined to each other at the other-end. to form a h or point; (see Figs.3 and 6). The lower beam member m is graduated in grammes to correspondto the lower scale bar 5, and it is to this member in that the rear endof the indicator f is connected through the medium of a sliding weightw. The upper beam member m is graduated in kilogrammes to correspondwith. the upper scale bar a and carries a sliding weight g to which therear end of the indicator c is attached. Hence, the adjustment of theweights y and 10 along the respective members of the beam willcorrespondingly shift the indicators 0 and 7, thereby causing theirpointer terminals to travel along the scale bars a and Z). Bothindicators c and f are disposed longitudinally of the casing Z: and inparallel relation to the side walls thereof and to each other; and ear-hof them has the form of an elon ated U. the bottomportion of which isdisposed below the lever system and projects rearwardly beneath thelower edge of the rear wall of the casing which is cut away or slottedfor that purpose, so that the vertical rear member or arm of theindicator is located exteriorly of the casing. The beam M likewise hasal most its entire slotted portion situated outside and in rear of thecasing, its solid stem portion 6 and its suspension mounting alone beingdisposed within the rearwardly-projecting extension the inner side wallof which is either partly or wholly removed.

The indicator 9 which coacts with the exact-weight scale it is alsoU-shaped, and its rear arm is disposed exteriorly of the casing and isattached at its upper end to the pointed outer or free end of the beam;its bottom member is likewise disposed below the plane of the leversystem. \Vhen the beam M is in horizontal position, which is of courseits normal, unloaded position, the pointer on the end of the indicator 9is disposed opposite the zero mark on scale h; it being assumed thatboth weights 3 and w are at zero position on the beam members m and mand, consequently, that the pointers on the ends of the indicators 6 andf are opposite the zero marks on the scale bars a and Z). If, now, thescale is to be setfor a weight of 1 kilogramme, the weight w is shiftedto indicate that amount on the beam member on, its pointer indicatingthe same amount on the front scale a. This adjustment has the effect oflowering the beam, which, in turn, causes a downward movement of thepointer g along the exact-weight scale it. The material to be weighed isthen deposited on the platform Z, which is thereby depressed and, inturn operates the lever system; the result being that the beam is causedto move upward, carrying with it the indicator 9, which, by its coactionwith scale h, shows at all times the exact amount of material (i. e.,the exact number of grammes) which must be added to or removed from, themass of material on the platform to bring such mass to the preciseamount for which the scale has been set. Thus, if the quantity ofmaterial on the platform is in excess of the amount to be weighed, thepointer 9 will move above the zero mark and will indicate the exactamount by which the desired weight is exceeded and which must,therefore, be removed; and similarly, if the quantity falls short of thedesired weight, the pointer will not move entirely up to the zero mark,but will stop short thereof, thus indicating the precise shortage.

I claim as my invention 1. A scale, comprising in combination, a beam; areceiving element for the material to be weighed; a lever systemconnecting the beam and receiving element to operate the former inaccordance with the movements of the latter; an indicator system forsetting the scale to weigh different definite amounts and including atleast one weight adjustable along the beam in accordance with theparticular amount to be weighed, an indicator arm connected to theweight to be shifted thereby, and a graduated scale member with whichthe indicator arm coacts; and a separate indicating device embodying anindicator arm connected to be shifted by the beam during the movementsthereof, and a graduat-ed scale member with which the last namedindicator arm coacts to indicate the precise difference in weightbetween the material on the receiving element and the amount for whichthe indicator system has been set.

2. A scale, comprising, in combination, a platform; a lever disposedtherebeneath and having a suspension mounting at one end; a beamfnlcrumed intermediate its ends; a suspension connection between theother end of said lever and the adjacent end of said beam; means on saidplatform bearing upon said lever intermediate the ends of the latter todepress the beam in accordance with the weight of material on theplatform a weight siidable along the beam; an indicator arm connected tosaid weight; a graduated scale member with which said arm coacts; aseparate indicator arm connected to the free end of the beam to beshifted by the rocking movements of said beam; and a separate graduatedscale member with which the lastnamed indicator arm coacts.

In testimony whereof I affix my signature.

CARLOS LUIS TOMS ABLSAMO.

